package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import com.sky.utils.CurrentHolderUtil;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;
    @Autowired
    private EmployeeService employeeService;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //  后期需要进行md5加密，然后再进行比对
          password =  DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }
   //新增员工
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //对象属性拷贝 spring自带
        BeanUtils.copyProperties(employeeDTO,employee);

        //设置账号状态
        employee.setStatus(StatusConstant.ENABLE);
        //设置默认密码
        //Java 中变量存储的是对象地址，而非对象本身，修改employee.password不会影响pwd变量的值（地址0x100不变）。
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        //设置创建和修改时间
      //  employee.setCreateTime(LocalDateTime.now());
      //  employee.setUpdateTime(LocalDateTime.now());

        //设置当前创建人id和修改人id
       //TODO 后期需婴改为当前用户的id
      //  employee.setCreateUser(CurrentHolderUtil.getCurrentId());
       // employee.setUpdateUser(CurrentHolderUtil.getCurrentId());
        employeeMapper.insert(employee);

    }

    //分页查询   MyBatis-Plus（MP）框架中，selectPage 是进行分页查询的核心方法
    //都共享当前线程的局部变量。service实现类通过threadlocal存进去page和每页记录数这俩局部变量,mapper层再取出来用
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
       Page<Employee> page= employeeMapper.pageQuery(employeePageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    //启用禁用员工账号
    @Override
    public void startOrStop(Integer status, long id) {
        //因为如果不用类的话就只能根据id改status，下次要用别的又得重新写 所以封装
//        Employee employee = new Employee();
//        employee.setStatus(status);
//        employee.setId(id);
        Employee employee = Employee.builder().status(status).id(id).build();
        employeeMapper.update(employee );
    }

    //根据id查询员工
    @Override
    public Employee getById(Long id) {
        Employee employee =employeeMapper.getByid(id);
        return employee;
    }
   //编辑员工信息
    @Override
    public void editInfo(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);

      //  employee.setUpdateTime(LocalDateTime.now());
      //  employee.setCreateUser(CurrentHolderUtil.getCurrentId());
        employeeMapper.update(employee);
    }

}
